Experimental study and phase equilibrium modeling of systems containing acid gas and glycol

Waheed Afzal, Martin P. Breil, Ioannis Tsivintzelis, Amir H. Mohammadi, Georgios M. Kontogeorgis, Dominique Richon

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

In this work, we study phase equilibria of systems containing acid gases and glycols. The acid gases include carbonyl sulfide (COS), hydrogen sulfide (H2S), and carbon dioxide (CO2) while glycols include monoethylene glycol (MEG), diethylene glycol (DEG), and triethylene glycol (TEG). A brief literature survey on the solubility of the acid gases and hydrocarbons in glycols is presented. New experimental solubility data mainly for COS and some limited data for H2S in glycols from 276 to 333K and at elevated pressures are reported. Experimental measurements have been carried out using the “static-synthetic” method. The reliability and repeatability of the experimental work are demonstrated. The experimental solubility data for COS and glycols, from this work, and those for H2S and CO2 from the literature are modeled using the cubic-plus-association (CPA) equation of state (EoS). CPA parameters for pure components and binary systems are reported. Satisfactory correlations have been achieved using temperature-independent interaction parameters. Various modeling strategies and alternatives using CPA are tested and the results are critically evaluated. The variations and trends in the values of binary interaction parameters are discussed for the different systems studied.

Original languageEnglish
JournalFluid Phase Equilibria
Volume318
Pages (from-to)40-50
ISSN0378-3812
DOIs
Publication statusPublished - 2012

Bibliographical note

Abbreviations: BIP, binary interaction parameters; EoS, equation of state; CPA,
cubic-plus-association; CR, combining rule; DEG, diethylene glycol; GPA, Gas Processors
Association; MEG, monoethylene glycol; mCR, modified combining rules;
RD, relative deviation; RAAD, relative absolute average deviation; SAFT, statistical
association fluid theory; SRK, Soave–Redlich–Kwong EoS; TEG, triethylene
glycol; TeEG, tetraethylene glycol; TPT, thermodynamic perturbation theory; VLE,
vapor–liquid equilibria.
This manuscript was partly presented at VIII Iberoamerican Conference on Phase
Equilibria and Fluid Properties for Process Design 2009 in Praia da Rocha, Portugal
and in 89th Annual GPA Convention in Austin TX, 2010.

Keywords

  • Glycol
  • Carbonyl sulfide
  • Hydrogen sulfide
  • Carbon dioxide
  • Experimental solubility data
  • Gas dehydration
  • Homomorph approach
  • CPA EoS

Cite this

Afzal, Waheed ; Breil, Martin P. ; Tsivintzelis, Ioannis ; Mohammadi, Amir H. ; Kontogeorgis, Georgios M. ; Richon, Dominique. / Experimental study and phase equilibrium modeling of systems containing acid gas and glycol. In: Fluid Phase Equilibria. 2012 ; Vol. 318. pp. 40-50.
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title = "Experimental study and phase equilibrium modeling of systems containing acid gas and glycol",
abstract = "In this work, we study phase equilibria of systems containing acid gases and glycols. The acid gases include carbonyl sulfide (COS), hydrogen sulfide (H2S), and carbon dioxide (CO2) while glycols include monoethylene glycol (MEG), diethylene glycol (DEG), and triethylene glycol (TEG). A brief literature survey on the solubility of the acid gases and hydrocarbons in glycols is presented. New experimental solubility data mainly for COS and some limited data for H2S in glycols from 276 to 333K and at elevated pressures are reported. Experimental measurements have been carried out using the “static-synthetic” method. The reliability and repeatability of the experimental work are demonstrated. The experimental solubility data for COS and glycols, from this work, and those for H2S and CO2 from the literature are modeled using the cubic-plus-association (CPA) equation of state (EoS). CPA parameters for pure components and binary systems are reported. Satisfactory correlations have been achieved using temperature-independent interaction parameters. Various modeling strategies and alternatives using CPA are tested and the results are critically evaluated. The variations and trends in the values of binary interaction parameters are discussed for the different systems studied.",
keywords = "Glycol, Carbonyl sulfide, Hydrogen sulfide, Carbon dioxide, Experimental solubility data, Gas dehydration, Homomorph approach, CPA EoS",
author = "Waheed Afzal and Breil, {Martin P.} and Ioannis Tsivintzelis and Mohammadi, {Amir H.} and Kontogeorgis, {Georgios M.} and Dominique Richon",
note = "Abbreviations: BIP, binary interaction parameters; EoS, equation of state; CPA, cubic-plus-association; CR, combining rule; DEG, diethylene glycol; GPA, Gas Processors Association; MEG, monoethylene glycol; mCR, modified combining rules; RD, relative deviation; RAAD, relative absolute average deviation; SAFT, statistical association fluid theory; SRK, Soave–Redlich–Kwong EoS; TEG, triethylene glycol; TeEG, tetraethylene glycol; TPT, thermodynamic perturbation theory; VLE, vapor–liquid equilibria. This manuscript was partly presented at VIII Iberoamerican Conference on Phase Equilibria and Fluid Properties for Process Design 2009 in Praia da Rocha, Portugal and in 89th Annual GPA Convention in Austin TX, 2010.",
year = "2012",
doi = "10.1016/j.fluid.2011.12.025",
language = "English",
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pages = "40--50",
journal = "Fluid Phase Equilibria",
issn = "0378-3812",
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}

Experimental study and phase equilibrium modeling of systems containing acid gas and glycol. / Afzal, Waheed; Breil, Martin P.; Tsivintzelis, Ioannis; Mohammadi, Amir H.; Kontogeorgis, Georgios M.; Richon, Dominique.

In: Fluid Phase Equilibria, Vol. 318, 2012, p. 40-50.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Experimental study and phase equilibrium modeling of systems containing acid gas and glycol

AU - Afzal, Waheed

AU - Breil, Martin P.

AU - Tsivintzelis, Ioannis

AU - Mohammadi, Amir H.

AU - Kontogeorgis, Georgios M.

AU - Richon, Dominique

N1 - Abbreviations: BIP, binary interaction parameters; EoS, equation of state; CPA, cubic-plus-association; CR, combining rule; DEG, diethylene glycol; GPA, Gas Processors Association; MEG, monoethylene glycol; mCR, modified combining rules; RD, relative deviation; RAAD, relative absolute average deviation; SAFT, statistical association fluid theory; SRK, Soave–Redlich–Kwong EoS; TEG, triethylene glycol; TeEG, tetraethylene glycol; TPT, thermodynamic perturbation theory; VLE, vapor–liquid equilibria. This manuscript was partly presented at VIII Iberoamerican Conference on Phase Equilibria and Fluid Properties for Process Design 2009 in Praia da Rocha, Portugal and in 89th Annual GPA Convention in Austin TX, 2010.

PY - 2012

Y1 - 2012

N2 - In this work, we study phase equilibria of systems containing acid gases and glycols. The acid gases include carbonyl sulfide (COS), hydrogen sulfide (H2S), and carbon dioxide (CO2) while glycols include monoethylene glycol (MEG), diethylene glycol (DEG), and triethylene glycol (TEG). A brief literature survey on the solubility of the acid gases and hydrocarbons in glycols is presented. New experimental solubility data mainly for COS and some limited data for H2S in glycols from 276 to 333K and at elevated pressures are reported. Experimental measurements have been carried out using the “static-synthetic” method. The reliability and repeatability of the experimental work are demonstrated. The experimental solubility data for COS and glycols, from this work, and those for H2S and CO2 from the literature are modeled using the cubic-plus-association (CPA) equation of state (EoS). CPA parameters for pure components and binary systems are reported. Satisfactory correlations have been achieved using temperature-independent interaction parameters. Various modeling strategies and alternatives using CPA are tested and the results are critically evaluated. The variations and trends in the values of binary interaction parameters are discussed for the different systems studied.

AB - In this work, we study phase equilibria of systems containing acid gases and glycols. The acid gases include carbonyl sulfide (COS), hydrogen sulfide (H2S), and carbon dioxide (CO2) while glycols include monoethylene glycol (MEG), diethylene glycol (DEG), and triethylene glycol (TEG). A brief literature survey on the solubility of the acid gases and hydrocarbons in glycols is presented. New experimental solubility data mainly for COS and some limited data for H2S in glycols from 276 to 333K and at elevated pressures are reported. Experimental measurements have been carried out using the “static-synthetic” method. The reliability and repeatability of the experimental work are demonstrated. The experimental solubility data for COS and glycols, from this work, and those for H2S and CO2 from the literature are modeled using the cubic-plus-association (CPA) equation of state (EoS). CPA parameters for pure components and binary systems are reported. Satisfactory correlations have been achieved using temperature-independent interaction parameters. Various modeling strategies and alternatives using CPA are tested and the results are critically evaluated. The variations and trends in the values of binary interaction parameters are discussed for the different systems studied.

KW - Glycol

KW - Carbonyl sulfide

KW - Hydrogen sulfide

KW - Carbon dioxide

KW - Experimental solubility data

KW - Gas dehydration

KW - Homomorph approach

KW - CPA EoS

U2 - 10.1016/j.fluid.2011.12.025

DO - 10.1016/j.fluid.2011.12.025

M3 - Journal article

VL - 318

SP - 40

EP - 50

JO - Fluid Phase Equilibria

JF - Fluid Phase Equilibria

SN - 0378-3812

ER -